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Finding the Fourth Proportional to 758.43, 1,046.62 and 426.90

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Solution

The fourth proportional to 758.43, 1,046.62 and 426.90 is: 589.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.43 : 1,046.62 = 426.90 : x
  2. Step 2: Convert to fraction form
    758.43/1,046.62 = 426.90/x
  3. Step 3: Cross multiply
    758.43x = 1,046.62 × 426.90
  4. Step 4: Simplify right side
    758.43x = 446,806.54
  5. Step 5: Solve for x
    x = 446,806.54/758.43
  6. Step 6: Final answer
    x = 589.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.